Hi, I built some years ago the pos200 pro (with 2 pots: attenuation and treble).
I disconnect the second pot (treble ) because I lost diagrams and I'm not sure on the right connection (when I set to 0 treble the amp was totally attenuated, like whit the main pot). There is something to modify and upgrade my pos?

Can I add a line output to use it with impulse responses?
I see 47k and 5k pot on the pos 100 scheme, I think it could work also with the 200 right?
Thanks